The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2025
Filed:
May. 18, 2022
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Stmicroelectronics (Shenzhen) R&d Co. Ltd., Shenzhen, CN;
Jian Wen, Shenzhen, CN;
Davide Luigi Brambilla, Segrate, IT;
Qiyu Liu, Shenzhen, CN;
Mei Yang, Shenzhen, CN;
Shuming Tong, Shenzhen, CN;
Francesco Stilgenbauer, Rho, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
STMicroelectronics (Shenzhen) R&D Co. Ltd., Shenzhen, CN;
Abstract
In an embodiment, an amplifier circuit includes a second stage that includes a first switch circuit including first and second terminals, a plurality of resistive elements coupled between the first and second terminals of the first switch circuit, and a plurality of switches configured to control an equivalent resistance between the first and second terminals of the first switch circuit. During play mode, the second stage has a gain between the input of the second stage and the output of the second stage of a first value. During a transition from mute mode to play mode, the amplifier circuit is configured to progressively increase the gain of the second stage from a second value to the first value. During a transition from play mode to mute mode, the amplifier circuit is configured to progressively decrease the gain of the second stage from the first value to the second value.